Virtual Reality (VR) devices present challenges in terms of vergence-accommodation conflict that lead to visual fatigue for the user over time. Fast switchable liquid crystal (LC) lenses which access multiple focal planes can help to overcome this challenge. The response time for Nematic liquid crystals (NLC) is in the millisecond range, while that of ferroelectric liquid crystals (FLC) in the microsecond order. In this paper we look at recent advances in fast switchable liquid crystal lenses using NLC, FLC or both, compare their design and properties with competing technologies. A discussion on the limitations of each design and technology have also been included.
Plasmonic nanostructures provide an excellent platform for label-free detection and manipulation of molecules based on their physical and spectral properties. Our recently discovered superchiral light on achiral plasmonic substrates was used to demonstrate enantioselective chiral molecule detection that are relevant to the pharmaceutical industry. The talk will focus on the detection of chiral drugs and biomolecules using a degenerate cavity-coupled plasmonic substrate. We also discuss advances made regarding the enantioselective separation of chiral molecules using plasmonic tweezers and prospective technical challenges that we aim to address in the future.
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